Photographic camera

ABSTRACT

The photographic camera which prints a code signal representing printing information on a film is capable of selecting a real focal length photographing mode for printing a normal range of a frame, a plurality of pseudo focal length photographing mode each being different in pseudo focal length from the other, and a close-up photographing mode. Exposure condition is limited in accordance with the selected mode. Upon selection of the photographing modes, a code signal indicative of said selection is produced and printed between frames on the film surface. The film after photographing with this camera is subjected to printing by means of a printer which reads the code signal printed on the film surface, determines an exposure value in accordance with the code signal and determines an enlargement ratio.

This application is a divisional of application Ser. No. 895,826, filedAug. 12, 1986, now U.S. Pat. No. 4,780,735.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a photographic camera for photographingan object onto a film.

2. Description of the Prior Art

A camera capable of changing over between a real focal lengthphotographing mode or normal photographing mode for photographing a realfocal length photographing range or normal photographing range on a filmand printing the said range and a pseudo focal length mode in which arange narrower than the real focal length photographing range isindicated and the indicated range alone printed, has already beenproposed in Japanese Laid Open Patent No. 26721/79 and in U.S. Pat. No.3,490,844.

However, if such a camera is constructed so that the brightness of thewhole real focal length photographing range is measured photometricallyby a light measuring means and an exposure control is made on the basisof results of the light measurement, then even a photographing range notprinted on a photographic paper in the pseudo focal length photographingmode will be measured photometrically. Thus, if an exposure control ismade on the basis of such a result in the pseudo focal lengthphotographing mode, there is a possibility that an appropriate exposurewill not be obtained with respect to the printed range in the pseudofocal length photographing mode. For example, if an object having anextremely high luminance as compared with other objects, such as thesun, is located in a corner of the real focal length photographingrange, the high luminance object (the sun) will not be printed on aphotographic paper in the pseudo focal length photographing mode. If insuch a situation there is made an averaged light measurement for thewhole focal length photographing range and an exposure control is madeon the basis of results obtained, an extreme under-exposure will resultwith respect to an object of the range printed in the pseudo focallength photographing mode. Conversely, in the case where an objectilluminated with a spot light and thus having a luminance much higherthan that of other objects is located centrally of the real focal lengthphotographing range, if there is made an averaged light measurement forthe whole real focal length photographing range and an exposure controlis performed on the basis of results obtained, an extreme over-exposurewill result with respect to an object of the range printed in the pseudofocal length photographing mode.

This can also be said of a printer of the type in which an imagememorized on a photographed film is printed on a photographic paper.More particularly, in the case of a frame photographed in the pseudofocal length mode, only a part of the photographed range on the frame isprinted on the photographic paper. Thus, if the brightness of the entirerange of the frame is measured and exposure value and color balance aredetermined on the basis of results obtained, then even the range notprinted on the photographic paper is subjected to the light measurementand the result is taken into account in the determination of exposurevalue and color balance. Therefore it is possible that a print havingappropriate density and color balance will not be obtained with respectto the range printed in the pseudo focal length photographing mode.

Further, where a frame photographed in the pseudo focal lengthphotographing mode in the above camera is enlarged to a print same sizeas that of a frame photographed in the real focal length photographingmode, the print enlargement ratio inevitably becomes larger in thepseudo focal length photographing mode frame than in the real focallength photographing mode frame. Consequently, in the case of printingthe frame photographed in the pseudo focal length photographing mode,blurring of the object image on the film caused by vibration of thecamera, which has not caused any problem in the real focal lengthphotographing mode, becomes conspicuous and therefore image quality ofthe print is degraded.

With respect to the image quality of the print, as the enlargement ratioin printing becomes larger, the film particles become more conspicuouson the print. The result is that a poor print is obtained especially inthe case of a high sensitivity film poor in particle properties.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a camera capable ofaffording an appropriate exposure in the pseudo focal lengthphotographing mode mentioned above.

It is another object of the present invention to provide a cameracapable of preventing the deterioration of image quality caused by theenlargement ratio of the printing in the pseudo focal lengthphotographing mode being larger than that in the normal photographingmode.

Other objects and features of the invention will become apparent fromthe following description taken in connection with the accompanyingdrawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a camera according to an embodiment ofthe present invention;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a sectional view showing a construction of a finder opticalsystem and a range finding optical system both used in the camera;

FIG. 5 is a schematic view showing printing range in the pseudo focallength photographing mode;

FIG. 6 is a schematic view showing a display in the camera finder field;

FIG. 7 is a sectional view showing a relation between a photographingrange of a photographing lens and a light measuring range of a lightmeasuring optical system both used in the camera;

FIGS. 8 and 9 illustrate display modes of a liquid crystal display usedin the camera;

FIG. 10 illustrates the camera with a back cover open, viewed from theback;

FIG. 11 is an enlarged front view of a code printing unit used in thecamera, viewed from the back;

FIG. 12 is a longitudinal sectional view of the code printing unit;

FIG. 13 is a partially enlarged transverse sectional view of the codeprinting unit;

FIG. 14 illustrates a film on which are printed the code signals, viewedfrom the back;

FIG. 15 illustrates code signals printed on the film;

FIG. 16 is an electrical circuit diagram of the camera;

FIG. 17 is a block diagram showing a construction of an automatic focusadjusting circuit used in the camera;

FIG. 18 is a graph showing a relation between aperture and exposure timeand also showing a flash emission timing;

FIG. 19 is a graph showing a relation between aperture and exposure timeat the time of change-over to flash photography;

FIGS. 20A, 20B, 20C and 21 are flow charts showing operation of acontrolling microcomputer used in the camera;

FIG. 22 is a flow chart showing details of step S8 therein;

FIG. 23 is a schematic view showing operation thereof in a typicalmanner;

FIGS. 24, 25 and 26 are each a flow chart showing operation of amicrocomputer for display;

FIG. 27 is a block diagram showing an automatic printer used in thesystem of this embodiment; and

FIG. 28 is a time chart showing operations thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

An embodiment of the present invention will be described in detailhereinunder with reference to the accompanying drawings.

In FIG. 1, which is a perspective view of a camera embodying the presentinvention, the reference numeral 2 denotes a camera body; numeral 4denotes a shutter release button; numeral 6 denotes a date selectionswitch for selecting whether a date is to be printed or not on aphotographic paper during the printing operation; numeral 8 denotes atrimming setting button for setting whether pseudo focal lengthphotographing mode is set or not and its printing size; and LCD₁represents a liquid crystal display for displaying various data relatedto photographing. The shutter release button 4, date selection switch 6and trimming setting button 8 are disposed on an upper surface of thecamera body 2 as shown in the top view of FIG. 2. The date selectionswitch 6 is a slide type; in its position shown, the date is printed,while when it is slid in the X direction in the figure, the date is nolonger printed. Either of the real focal length photographing mode ornormal photographing mode and the pseudo focal length photographingmode, and the ratio of trimming in the latter are determined accordingto the number of depressions of the button 8. As will be describedlater, when a film having a sensitivity below ISO 400 is loaded, thetrimming setting button 8 is not depressed at all, under which conditionthe pseudo focal length photographing mode is not selected and the wholeof a real focal length photographing range or normal photographing rangeis printed. When the trimming setting button 8 is depressed once, atrimming "1" mode is obtained in which a little narrower photographingrange than the real focal length photographing range is printed.Depressing it twice affords a trimming "2" mode of a still narrowerprinting range, and depressing it three times results in a trimming "3"mode of the narrowest printing range. If it is further depressed, therewill be obtained a close-up mode as will be described later. A stillfurther depression of the trimming setting button 8 will result inreturn to the real focal length photographing mode. Details on thisrespect will be set forth later.

In FIG. 1, moreover, the numeral 12 denotes a flash unit portion;numeral 14 denotes a finder window; numeral 16 denotes a finderilluminating window; and numerals 18a and 18b represent a pair of rangefinder windows. These are arranged on a front face of the camera body 2as shown in the front view of FIG. 3. Numerals 20 and 22 denote aphotographing lens and a light measuring window for automatic exposurecontrol.

FIG. 4 is a sectional view showing a finder optical system and a rangefinding optical system both used in such camera. In FIG. 4, the finderoptical system is constituted by an inverted Galilean type opticalsystem comprising an objective lens L₁ having a negative refractivepower and an eyepiece lens L₂ having a positive refractive power, bothdisposed in the interior of the finder window. Between the objectivelens L₁ and the eyepiece lens L₂ is disposed a half mirror H wherebylight which has been reflected by a mirror M after passing through aliquid crystal display LCD₂ disposed behind the finder lighting window16 is conducted to the finder. On the other hand, behind the rangefinder window 18a is disposed a light emitting diode 24 for rangefinding to project an infrared light beam to an object through aprojection lens L₃. Light reflected from the object is detected by alight detecting element 26 for range finding through a light receivinglens L₄ disposed behind the range finder window 18b, and from the stateof light detected the distance to the object is determined. This rangefinding principle is already well known, so its details are hereomitted.

The printing range in the selection of pseudo focal length photographingmode will now be explained with reference to FIG. 5, which is a frontview showing one exposure plane of an ordinary 35 mm film. In the realfocal length photographing mode not selecting the pseudo focal lengthphotographing mode, the whole range of 24 mm long by 36 mm wide isprinted on a printing paper. In the trimming "1" mode, the rangeindicated by A₁ is printed; in the trimming "2" mode, the rangeindicated by A₂ is printed; and in the trimming "3" mode, the rangeindicated by A₃ is printed. The ratios of the print ranges on the filmin the trimming "1", "2" and "3" modes relative to the real focal lengthphotographing mode are set as approximately 1:1/√2:1/2:1/3. Therefore,in the case where frames after photographing in those modes are enlargedto the same size, there are printed the same ranges as thosephotographed by lenses of the pseudo focal lengths shown in Table 1below, provided a focal length, f, of the photographing lens is assumedto be 35 mm.

                  TABLE 1                                                         ______________________________________                                        Photographing Mode                                                                             Focal Length                                                 ______________________________________                                        Normal Mode       35 mm                                                       Trimming "1" Mode                                                                               50 mm                                                       Trimming "2" Mode                                                                               70 mm                                                       Trimming "3" Mode                                                                              105 mm                                                       ______________________________________                                    

Referring now to FIG. 6, there are illustrated displays in the finderfield effected by means of a liquid crystal display LCD₂. In the liquidcrystal display LCD₂ there are provided four kinds of frames F₀, F₁, F₂and F₃ each corresponding to the printing ranges of the real focallength photographing mode and trimming "1", "2" and "3" modesrespectively. Any one of these frames is displayed selectively accordingto a set state of the trimming setting button 8. More particularly, inthe finder field, the frame F₀ is displayed in the real focal lengthphotographing mode; F₁ is displayed in the trimming "1" mode; F₂ isdisplayed the trimming "2" mode; and F₃ displayed is in the trimming "3"mode and the close-up mode.

Now, with reference to FIG. 7, the relation between the rangephotographic by a photographing lens 20 and printed, and a lightmeasuring range of a light measuring system disposed in the interior ofthe light measuring window 22, will be explained. In FIG. 7, in the realfocal length photographing mode, the range of B₁ is photographed by thephotographic lens 20 and printed. In the trimming "3" mode of thesmallest printing range, the range of B₂ is printed. It is here assumedthat the angle of the field of view of the photographic lens 20 relativeto the smallest printing range B₂ is α. On the other hand, behind thelight measuring window 22 is disposed a light measuring optical systemcomprising a light measuring lens L₅, a filter F and a light receivingelement 28. If its angle of the field of view is β, the relation thereofto α is α≧β. Under this construction, a light measuring range is alwayspositioned within the range to be printed, whereby a light measuringinformation always corresponding to the range to be printed can beobtained accurately even if the pseudo focal length photographing modeis set.

Referring now to FIG. 8, there are illustrated display modes of theliquid crystal display LCD₁ shown in FIG. 1. Although all the displayelements are indicated in FIG. 8, this does not actually occur. Themarks M₁, M₂ and M₃ denote display elements which represent set modes ofphotographing of the camera. In the real focal length photographingmode, only the display element M₁ is indicated. When any one of thetrimming modes "1", "2" and "3" is selected by operation of the trimmingsetting button 8, only the display element M₂ is indicated. On the otherhand, upon selection of the close-up mode, only the display element M₃is indicated.

The marks D₁, D₂, D₃, D₄ and D₅ represent display elements forindicating printing ranges according to photographing modes. In the realfocal length photographing mode or normal photographing mode, thedisplay element D₁ which shows the broadest printing range is indicated.In the case of the pseudo focal length photographing mode, any one ofthe display elements D₂, D₃ and D₄ is indicated selectively according tothe trimming "1", "2" or "3" mode selected, together with the displayelement D₁. For example, in the trimming "1" mode which is of thebroadest printing range in the pseudo focal length photographing mode,the display elements D₁ and D₂ are indicated; in the trimming "2" mode,the display elements D₁ and D₃ are indicated; and in the trimming "3"mode, the display elements D₁ and D₄ are indicated. Further, in theclose-up photographing mode, the display element D₅ is indicated.

The mark DA represents a display element for indicating date dataprinted. The date data is not printed when its printing mode is notselected. The display element DA may be so constructed as to indicate adate even where printing of date data is not selected. The mark FCrepresents a display element for indicating the number of framesphotographed. Further, the mark FE represents a display element forindicating a loaded state of the film. In this way, variousphotographing modes, printed date, the number of frames photographed,and the film loaded state, are indicated by the liquid crystal displayLCD₁.

For example, FIG. 9 shows a display mode of the liquid crystal displayLCD₁ in which the trimming "2" mode has been selected whereby thedisplay elements M₂, D₁ and D₃ are indicated; data corresponding to"July 25, 1985" is printed as date data; "24" is indicated as the numberof frames photographed; and a normal loaded state of the film isindicated.

Referring now to FIG. 10, there is illustrated the camera body 2 asviewed from the back, with a back lid thereof open. In FIG. 10, a spoolchamber 2a for housing a spool 28 therein is provided in the camera body2 in a right-hand position in the figure, while in a left-hand positionin the figure there is provided a patrone chamber 2b for loading thereinof a patrone. Consequently, the film when wound up is moved from theleft to the right in the figure. Numeral 2c denotes a frame provided ina position corresponding to the film, and at the rightmost end thereofis disposed a code printing unit 30 for printing various photographicdata as codes in the film.

As shown in the enlarged view of FIG. 11, the code printing unit 30 hasseventeen optical fibers 30a one ends of which are arrangedlongitudinally in the figure in an opposed relation to the emulsionsurface of the film. The other ends of these many optical fibers 30a areopposed to seventeen light emitting diodes 32a which are fixed to alight emitting diode substrate 32, as shown in FIG. 12 which is anenlarged sectional view of the code printing unit 30.

FIG. 13 is an enlarged transverse sectional view of the code printingunit 30 and its vicinity, in which the mark FI represents a film loadedand wound up. The film FI is held in a predetermined position of theframe 2c under pressure by means of a pressure plate 40 which is givenan appropriate pressure by a pressure plate spring 38, the spring 38being fixed with pin 36 to a back lid 34 of the camera. The codeprinting unit 30 is fixed to the camera body and a light shielding tube42, and on its face opposed to an optical axis of the photographic lensthere is provided a light shielding plate 44. The light emitting diodes32a are connected through a flexible board PB to a later-described lightemitting diode driving circuit LEDR which functions to control ON-OFF ofthe light emitting diodes 32a, thereby setting a code to be printed onthe film.

Consequently, a code corresponding to each frame is printed on therightmost end of the frame when viewed from the back of the film, asshown in FIG. 14. More specifically, code CO₁ corresponds to frame FI₁,code CO₂ to frame FI₂ and code CO₃ to frame FI₃. The mark CR in FIG. 14represents the range in which code is read; the right-hand side in thefigure is the fore end side of the film, while the left-hand side is thepatrone side.

For each frame of the film, each code is constituted by a 17-bit digitalsignal. Data represented by these bits will now be explained withreference to FIG. 15. FIG. 15 is a rear view of the film photographed,like FIG. 14, in which the right-hand side is the fore end side of thefilm. The 17-bit code comprises, successively from above in the figure,a 3-bit trimming information code Ct, a 1-bit date print permission ornot permission information code Cs, a 4-bit year information code Cy, a4-bit month information code Cm and a 5-bit day information code Cd. Thetrimming information code Ct will now be explained in detail. If thebits of this code Ct are assumed to be b₁, b₂ and b₃ successively fromabove in the figure, the relation between a set photographing conditionand those bit signals is as shown in Table 2 below.

                  TABLE 2                                                         ______________________________________                                        Photographing Mode                                                                           b.sub.1     b.sub.2                                                                             b.sub.3                                      ______________________________________                                        Normal Mode    0           0     0                                            Trimming "1" Mode                                                                            0           0     1                                            Trimming "2" Mode                                                                            0           1     0                                            Trimming "3" Mode                                                                            1           0     0                                            Close-up Mode  1           0     0                                            ______________________________________                                    

In the numeral columns of the above table, "1" indicates that thecorresponding light emitting diode of that bit is turned ON, while "0"indicates turning OFF thereof.

The date print permission or not permission information code Cs becomes"1" in the case of printing a date and "0" when a date is not printed.As to the year information code Cy, month information code Cm and dayinformation code Cd, data of year, month and day are converted to binarydigits.

The following description is now provided about the electrical circuitin the camera of this embodiment, using the circuit diagram of FIG. 16.In FIG. 16, the mark SW₁ denotes a light measuring switch which isclosed by the first-stage depression of the shutter release button 4shown in FIG. 1; SW₂ denotes a release switch which is closed bydepression up to the second stage of the button 4; SW₃ denotes a keyswitch which is opened and closed in interlock with the trimming settingbutton 8 shown in FIG. 1; SW₄ denotes a winding switch which is closedin response to shutter release and opened upon completion of the filmwinding; SW₅ denotes a back lid switch which is opened upon closing ofthe back lid 34 of the camera and opened upon opening of the same lid;SW₆ denotes a film sensing switch which is opened when the film isloaded and wound up and is closed when the film is not loaded; SW₇denotes a count switch which is closed at the beginning of the shutterrelease operation and opened upon completion of charge of the shutter;and SW₈ denotes a date print selection switch which is closed when adate printing mode is selected and is opened when date printing mode isnot selected.

The switches SW₁ to SW₄, which are starting switches, are connected toan interruption terminal INT of a controlling microcomputer CMC througha NAND gate NA and also connected directly to input terminals PI₁, PI₂,PI₃ and PI₄ of the controlling microcomputer CMC. Interruption to thecontrolling microcomputer CMC is caused by the positive edge of input tothe interruption terminal INT. The switch SW₅ is connected to an inputterminal of the NAND gate NA through a differential circuit comprising acapacitor C₂ and a resistor R₃. This is for setting the count value ofthe film counter to "0" when the back lid of the camera is opened.Further, the switches SW₅ to SW₇ are connected to input terminals PI₅,PI₆ and PI₈, respectively, of the controlling microcomputer CMC. Theswitches SW₁ to SW₇ are connected to a power terminal E₁ through pull-upresistors, respectively.

The mark E represents, a power battery of the camera, having an outputwhich is connected to an input terminal of the/controlling microcomputerCMC through a stabilizing circuit comprising a diode D₂ and a capacitorC₃. To the circuits which are liable to cause erroneous action due tothe change in voltage supplied thereto, electric power is fed from thepower terminal E₁ stabilized by the stabilizing circuit, while to theother circuits the electric power is fed directly from the power batteryE.

The mark FL represents a flash circuit including a flash tube for flashphotography and a control circuit for the flash tube, in which a boostercircuit for applying a high voltage to a main capacitor is operated witha signal provided from an output terminal PO₇ of the controllingmicrocomputer CMC, and flashing is started with a signal provided froman output terminal P0₈. Further, when the charging voltage for the maincapacitor reaches a predetermined value, a charge completion signal isfed to the controlling microcomputer CMC through the input terminal PI₇.

The mark MD denotes a motor driving circuit which controls the filmwinding motor M. With a signal provided from an output terminal PO₅ ofthe controlling microcomputer CMC, the motor M is driven to wind up thefilm, and its drive is braked with a signal provided from an outputterminal PO₆.

The mark CAS denotes film sensitivity reading switches which read dataon film sensitivity prestored in the film patrone loaded into the cameraand which are opened or closed according to the read data. The filmsensitivity data as digital data read by each switch CAS is converted toan analog signal by means of a D/A converter (D/A). This analog filmsensitivity signal is fed to a light measuring circuit comprising aphoto diode PD, an operational amplifier OP and a logarithmiccompressing diode D₁, in which it is added to a light measuring signal.The output of this light measuring circuit is therefore a lightmeasuring signal with the film sensitivity signal added thereto. Thissignal is applied to the base of a transistor TR₁ through a buffer B andis subjected to a logarithmic expanding in logarithmic expanding circuitcomprising the transistor TR₁ and a capacitor C₁. The charging voltagefor the capacitor C₁ is compared with a predetermined voltage E₂ bymeans of a comparator CN, and when it drops below E₂, a transistor TR₅becomes non-conducting and a shutter magnet SMG is de-energized to closethe shutter. Transistors TR₂ and TR₃ are controlled by an outputterminal P0₄ of the controlling microcomputer CMC, and they are forcontrolling the timing of the energizing of the shutter magnet SMG andthe logarithmic expanding. Further, a transistor TR₄ is controlled by anoutput terminal PO₃ of the controlling microcomputer CMC, and it is forcharging the capacitor C₁ rapidly to change a maximum aperture value andto change a longest shutter speed according to the photographing modeselected, as will be described later.

The output of the light measuring circuit, which is a light measuringsignal with the film sensitivity signal added thereto, is fed to an A/Dconverter (A/D) and converted to a digital signal, which in turn is fedto the controlling microcomputer CMC through input terminal PIAD.Further, the digital signal according to film sensitivity provided fromeach switch CAS is fed to the controlling microcomputer CMC from inputterminal PIDX of the microcomputer and also fed to a later-describeddisplay microcomputer DMC.

The display microcomputer DMC controls the display of the liquid crystaldisplay LCD₁ on the upper surface of the camera and that of the liquidcrystal display LCD₂ in the finder, and it also controls the codeprinted in the film. It is supplied with the electric power through thepower terminal E₁, and the date print selection switch SW₈ is connectedto an input terminal pi₁ of the display microcomputer DMC. The displaymicrocomputer DMC is constructed so that interruption is caused by asignal applied to an interruption terminal int₁ or int₂ which areconnected to output terminals PO₁₁ and PO₁₂, respectively, of thecontrolling microcomputer CMC. Interruption to the interruption terminalint₁ is caused when changing the display of the liquid crystal displaysLCD₁ and LCD₂, while interruption is caused to the interruption terminalint₂ at the time of printing code on the film.

Further, signals concerning photographing modes are each provided fromthe controlling microcomputer CMC to the display microcomputer DMCthrough output terminal POD and input terminal piD. Moreover, asmentioned above, signals on film sensitivity are each fed to inputterminal piDX. Further, a clock circuit for determining a date to beprinted on the film is incorporated in the display microcomputer DMC.

The display microcomputer DMC controls the liquid crystal display LCD₁on the upper surface of the camera and the liquid crystal display LCD₂in the finder, through a liquid crystal drive circuit LCDR. Therefore,photographing mode signal, date signal, film presence-absence signal,film winding-related signal, and date print permission or not permissionsignal, are transmitted from the display microcomputer DMC to the liquidcrystal drive circuit LCDR, which in turn latches those data to bedisplayed. Further, the display microcomputer DMC turns ON or OFF thelight emitting diodes 32a for code printing, through a light emittingdiode driving circuit LEDR. The light emitting time of each lightemitting diode 32a is varied according to the film sensitivity signalfed to the input terminal piDX.

The mark AF represents an automatic focusing circuit which measures thedistance up to an object automatically and adjusts the focus position ofthe photographing lens according to the results of the measurement. Theautomatic focusing circuit AF, which is supplied with electric powerfrom the power terminal E₁, starts its automatic focusing operation uponreceipt of a signal from output terminal PO₁ of the controllingmicrocomputer CMC. The distance to the object thus detected is fed as a4-bit digital signal to the controlling microcomputer CMC from inputterminal PIAF. Output terminal PO₂ of the microcomputer CMC becomes "H"when the camera is set to the close-up mode, and all the bits of thedistance signal related to the distance to the object are made "H" tolet the distance signal indicate the closest distance forcibly. At thistime, therefore, the photographic lens is set in the closest state. Themark LMG represents a lens stopping magnet which is de-energized uponcoincidence of the distance signal with signal indicative of theshifting amount of the lens to stop the shifting of the photographinglens.

The RMG represents a release magnet for starting the shifting of thelens. The release magnet RMG is controlled by a signal from outputterminal PO₁₀ of the controlling microcomputer CMC. After energizing fora certain period of time, it is de-energized to disengage thephotographic lens, thereby allowing the shifting of the photographiclens to start.

A more detailed construction of the automatic focusing circuit AF isshown in FIG. 17, in which the mark DD represents a distance detectingcircuit for measuring the distance up to an object, the operation of thecircuit DD being started by a signal from output terminal PO₁ of thecontrolling microcomputer CMC. Its optical system is shown in FIG. 4.The distance to the object detected by the distance detecting circuit DDis output as a 4-bit digital signal, and the signal of each bit are fedto comparator CON circuit through an OR circuit and also applied to thecontrolling microcomputer CMC through input terminal PIAF. To all theother input terminals of the OR circuit are connected the outputterminal PO₂ of the microcomputer CMC. Therefore, when the close-up modeis selected, all the bits of the distance signal fed to the comparatorCON are "H", representing the closest position, independently of theoutput signal from the distance detecting circuit DD.

On the other hand, the mark EC represents an encoder which providespulses according to the shifting amount of the photographic lens. Thepulses provided from the encoder EC are counted by a counter CU which isreset by a signal from the output terminal PO₁ of the controllingmicrocomputer CMC. This count value is compared with the distance signalby means of the comparator CON, which provides an output signal uponcoincidence of both signals to de-energize the lens stop magnet LMG,thereby stopping the shifting of the photographic lens in the positioncorresponding to the distance signal.

In the camera of this embodiment, when a frame is photographed in thepseudo focal length photographing mode, that is, the trimming "1", "2"or "3" mode or the close-up mode, the enlarging ratio of the framebecomes larger in printing if the frame is printed to the same size asthat of frame photographed in the real focal length photographing mode.Consequently, blur and flare which have not been conspicuous in the realfocal length photographing mode become conspicuous. To avoid this, inthe camera of this embodiment, the maximum aperture value (i.e. maximumF-number) and the longest (maximum) shutter speed are varied accordingto the printing size in the frame. Therefore, if the pseudo focal lengthphotographing mode is selected, the depth of field is extended and thelongest shutter speed (the maximum exposure time) is limited foravoiding the blurring of the object image on the film. Here, the largerthe maximum aperture value, the shorter the maximum shutter speed, sincethe shutter is operated as an aperture diaphragm in this embodiment. Butthe present invention is not limited to this construction. It may beconstructed so that only the maximum aperture value or only the shutterspeed limit is changed according to the selected photographing mode.

Table 3 below shows photographing modes as well as maximum aperturevalues (maximum F-number) and lower limit values of the shutter speed inthis embodiment.

                  TABLE 3                                                         ______________________________________                                        Photographing Mode                                                                            Avmax         Tvmin                                           ______________________________________                                        Normal Mode     2.8           1/30                                            Trimming "1" Mode                                                                             2.8           1/30                                            Trimming "2" Mode                                                                             4             1/60                                            Trimming "3" Mode                                                                             5.6           1/250                                           Close-up Mode   16            1/1000                                          ______________________________________                                    

In the above table, "Avmax" and "Tvmin" represent maximum aperture valueand longest limit value of the shutter speed, respectively. This isillustrated in FIG. 18, in which the vertical axis represents aperturevalue and the axis represents the time counted from the opening of theshutter. In the real focal length photographing mode or the trimming "1"mode, it is possible to open the aperture and to lengthen the shutterspeed up to the combination of aperture value (F-number) 2.8 and shutterspeed 1/30, as indicated by A. In the trimming "3" mode, the aperturecan be opened and the shutter speed can be lengthened up to thecombination of aperture value (F-number) 5.6 and shutter speed 1/60, asindicated by B. Further, in the close-up mode, only the combination ofaperture value (F-number) 16 and shutter speed 1/1000 can be set. Wherean appropriate exposure is not obtained under such combinations oflimited apertures and shutter speeds, flashing is made automatically. Asshown in the lower time chart of FIG. 18, where the combination ofaperture value (F-number) 5.6 and shutter speed 1/60 causesunder-exposure for example in the trimming "2" mode, a signal is issuedfrom the output terminal PO₈ of the controlling microcomputer CMC at atime point T₁ at which the shutter also serving as aperture is opened upto an aperture value (F-number) of 8 calculated in accordance with thedistance signal provided from the automatic focusing circuit AF, wherebyflashing is started. And at a time point T₂ at which the shutter isopened up to an aperture value (F-number) of 5.6, a signal is issuedfrom the output terminal PO₄, whereby the shutter closing operation isstarted.

In this connection, an exposure value EV for change-over to flashing isalso changed according to the selected photographing mode. Table 4 showsthe relation between photographing modes and exposure values (assumed tobe Evc) for change-over to flashing.

                  TABLE 4                                                         ______________________________________                                                         Exposure Value for                                           Photographing Mode                                                                             Change-over                                                  ______________________________________                                        Normal Mode      Ev 8                                                         Trimming "1" Mode                                                                              Ev 8                                                         Trimming "2" Mode                                                                              Ev 10                                                        Trimming "3" Mode                                                                              Ev 12                                                        Close-up Mode    Ev 18                                                        ______________________________________                                    

If the subject brightness is Bv, film sensitivity Sv, aperture value Avand shutter speed Tv in APEX calculation, the exposure value Ev (or Evc)is defined as follows:

    EV (or Evc)=Bv+Sv=Av+Tv

The relation between aperture value at the time of change-over toflashing and shutter speed value is shown in FIG. 19, in which itsvertical axis represents aperture value and its horizontal axisrepresents shutter speed. In the real focal length photographing modeand the trimming "1" mode, flashing is not made at an exposure value Evof 8 or more as indicated by Da, while in the trimming "2" mode,flashing is not made only at an exposure value Ev of 10 or more like Ea.Further, in the trimming "3" mode, flashing is not made only at anexposure value Ev of 12 or more like Fa, and in the close-up mode,flashing is made only at an exposure value Ev of 18 or more (not shown).This is for minimizing the aperture to make the depth of field large inthe case where the enlarging ratio in printing is large.

The operation of the controlling microcomputer CMC for controlling thecamera of this embodiment will now be explained with reference to FIGS.20A, 20B and 20C which are a flow chart showing operations of thecontrolling microcomputer CMC in the camera of this embodimentillustrated in FIG. 16. In FIG. 20A, circuits are reset upon power ONreset caused by loading of the battery, then in step S0 the input ports,the output ports and memory of the controlling microcomputer CMC are allinitialized. More specifically, all the other output terminals than PO₁₀of the microcomputer CMC are so initialized as to output "L", and thephotographing mode is initialized to the real focal length photographingmode. Then, in step S1, each port and flag of the controllingmicrocomputer CMC are initialized and in step S2 there is made an issueof "H" signal at the output terminal PO₇ of the same microcomputer,whereby the booster circuit in the flash circuit FL is allowed to startoperation. Then, in step S3, an external interruption to theinterruption terminal INT of the controlling microcomputer CMC ispermitted and in step S4 the microcomputer assumes a state of normalstop.

Then, when an external interruption is caused to the interruptionterminal INT of the controlling microcomputer CMC by any one ofdepression of the shutter release button 4, depression of the trimmingsetting button 8, winding up of the film, and opening or closing of theback lid, other external interruptions are inhibited in step S5 and theprogram advances to step S6. In step S6 ("step" will be omittedhereinafter), an open or closed state of the winding switch SW₄connected to the input terminal PI₄ of the controlling microcomputer CMCis detected. If the switch SW₄ is open (OFF) and the winding of the filmis over, the program advances to S7, in which DX code data on filmsensitivity of the switch CAS is received from the input terminal PIDX.Then in S8, data on photographing mode (trimming size) is received fromthe input terminal PI₃ to which is connected the key switch SW₃interlocked with the trimming setting button 8. The details will bedescribed later.

Then in S9, an open or closed state of the back lid switch SW₅ isdetected from the input terminal PI₅ and if the back lid is open and theback lid switch SW₅ is opened (OFF), the program advances to S10, inwhich the count value of the film counter for counting the number offrames photographed of the film is set to "0". If the back lid is closedand the back lid switch SW₅ is closed (ON) in S9, the program advancesto S11 without passing through S10. In S11, data necessary for displayis transmitted from the controlling microcomputer CMC to the displaymicrocomputer DMC after interruption from the display rewriting outputterminal PO₁₁, whereby display is made by the liquid crystal displaysLCD₁ and LCD₂.

Then in S12, an open or closed state of the light measuring switch SW₁interlocked with the shutter release button 4 is detected from the inputterminal PI₁, and if the switch SW₁ is open (OFF), the program returnsto S1 and the microcomputer CMC enters the normal stop condition of S4.If the light measuring switch SW₁ is closed (ON) at S12, there is made afalling of the signal at the output terminal PO₇ is made "L" to stopboosting by booster circuit in the flash circuit FL in S13. Then, inS14, the automatic focusing circuit AF is operated by a start signalprovided from the output terminal PO₁ of the controlling microcomputerCMC, and in S15 an open or closed state of the release switch SW₂interlocked with the shutter release button 4 is detected from the inputterminal PI₂. If the release switch SW₂ is open (OFF), the programreturns to S12 and the operations from S12 to S15 are repeated forwaiting for closing the release switch SW2 by the depression of shutterrelease button 4 to the second stage. If a closed state of the releaseswitch SW₂ is detected in step S15, the program advances to shutterreleasing operations from S16 as will be described later.

On the other hand, if a closed (ON) condition of the winding switch SW₄is detected in S6, this means that the winding of the film has not beencompleted yet, so the program advances to S38 in FIG. 20B to stopboosting of the flash circuit FL and enters a winding routine from S39.In S39, the motor driving circuit MD is driven by a signal provided fromthe output terminal PO₅ of the controlling microcomputer CMC to startoperation of the film winding motor M, thereby allowing the winding ofthe film to start. Then, in S40, an open or closed state of the windingswitch SW₄ is detected to detect completion of the winding of the film.The motor M is driven until the winding switch SW₄ is opened (OFF) uponcompletion of the film winding. Once opening (OFF) of the winding switchSW₄ is detected in S40, the rotation of the motor M is stopped to stopthe winding of the film in S41, then the program advances to S42.

In S42, an open or closed state of the film sensing switch SW₆ isdetected from the input terminal PI₆ of the controlling microcomputerCMC. If the film is not loaded in the camera and the film sensing switchSW₆ is closed (ON), data necessary for display is transmitted from thecontrolling microcomputer CMC to the display microcomputer DMC in stepS45, then the program returns to S1 and the microcomputer assumes thestate of normal stop in S4. If it is detected in step S42 that the filmhas been wound up and the film sensing switch SW₆ is open in S42, theprogram advances to S43 and an open or closed state of the back lidswitch SW₅ is detected. In S43, if the back lid is open and the back lidswitch SW₅ is closed (ON), the program advances to S45, in which datanecessary for display is transmitted from the controlling microcomputerCMC to the display microcomputer DMC. Then, the program returns to S1and the microcomputer assumes the state of normal stop in S4. If theback lid is closed and the back lid switch SW₅ is open (OFF) in S43, theprogram advances to S44 and the count value of the film counter isincremented by "1", then the program advances to S45, in which datanecessary for display is transmitted from the controlling microcomputerCMC to the display microcomputer DMC. Then, the program returns to S1and the microcomputer assumes the state of normal stop in S4. Under sucha construction, the film counter is prevented from counting up when theback lid of the camera is open or when the film is not loaded in thecamera.

The release routine from S16 will now be explained. In S16, the lightmeasuring signal which takes the film sensitivity into account is fedfrom the A/D converter (A/D) to the controlling microcomputer CMCthrough the input terminal PIAD. This light measuring signal is assumedto be a light measuring data Evm. Then, in S17, an exposure value Evcaccording to the set photographing mode is read from ROM because ofdifferent exposure values Evc for change-over to flashing according tophotographing modes as shown in FIG. 19 of this embodiment. Then, inS18, a comparison is made between the light measuring data Evm and theexposure value Evc for change-over to flash photographing, and ifEvm>Evc, the program advances to S25 as will be described later. On theother hand, if the relation of the two is not Evm>Evc, this means thatthe light measuring data Evm is lower than the exposure value Evc forchange-over to flash photography, so whether the charging of the maincapacitor for flashing in the flash circuit FL has been completed or notis judged from the input terminal PI₇ of the controlling microcomputerCMC in S19. If said charging is over, the program advances to S20 to seta flashing flag indicative of a flash photography. On the other hand, ifthe charging has not been completed yet, the program returns to S1,waiting for the completion of the charging in S4.

In S21, whether the photographing mode is set to the close-up mode ornot is judged, and if the answer is negative, a signal on the distanceto object is fed from the automatic focusing circuit AF to thecontrolling microcomputer CMC through the input terminal PIAF in S23. Onthe other hand, if it is judged in S21 that the photographing mode isset to the close-up mode, the program advances to S22, in which a signalof "H" is transmitted from the output terminal P0₂ of the controllingmicrocomputer CMC to the automatic focusing circuit AF to make thesignal indicative of the distance to object forcibly into a signalcorresponding to the closest distance. Likewise, in step S23, a signalon the distance to object is fed from the automatic focusing circuit AFto the controlling microcomputer CMC through the input terminal PIAF.

In S24, the controlling microcomputer CMC reads from ROM a valuecorresponding to the signal on the distance to object fed from theterminal PIAF and sets it to a flash timing timer provided in thecontrolling m CMC. This is because in the case of flash photography anaperture value is determined according to the distance to object bymeans of a flashmatic mechanism and a flash timing is determinedaccording to the said aperture value as shown in FIG. 18. Then, in S25,the controlling microcomputer CMC reads a value according to thephotographing mode from ROM and sets it to an exposure limiting timer.This is because in this embodiment the maximum aperture value and thelongest shutter speed are limited according to photographing modes.

In S26, a printing signal is provided from the output terminal PO₁ ofthe controlling microcomputer CMC and code data are printed outside theframe of the film according to ON-OFF state of the corresponding lightemitting diodes 32a. Then, in S27, the shutter magnet SMG is energizedby the positive edge of a signal from the output terminal PO₄ of thecontrolling microcomputer CMC and the operation of the release magnetRMG is started by the signal from the output terminal PO₁₀, therebycausing shifting of the photographic lens after a certain time. Then, inS28 in FIG. 20C, an open or closed state of the trigger switch SW₇ isdetected from the input terminal P1₈ of the controlling microcomputerCMC, waiting for closing of the same switch. If the trigger switch SW₇is closed (ON) at the beginning of the shutter release operation, theprogram advances to S29, in which integration of the quantity of lightexposed is started. In this connection, the light measuring system inthis embodiment has a sub aperture whose diameter varies according tothe quantity of light passing through the lens shutter, and the chargingof the capacitor C₁ is started upon start of integration of the quantityof light exposed.

In S30, judgment is made as to whether a flashing flag indicative of aflash photography is set or not. If the said flag is set, the programadvances to S31, in which the flash timing timer is started and timerinterruption is permitted, then the program advances to S32. If theflashing flag is not set in S30, the program advances to S32 directly,in which the exposure limiting timer having a preset time valueaccording to an appropriate exposure is started. And in S33 there ismade judgment continuously as to whether this timer overflows or not.Since a lens shutter which serves as both an aperture and a shutter isused in this embodiment, an aperture value and a shutter speed value areset simultaneously by a single exposure limiting timer. However, thecamera may be constructed so that the aperture and the shutter speed arecontrolled separately and hence their combination can be changedvariously.

If an overflow of the exposure limiting timer is detected in S33, theprogram advances to S34, the transistor TR₄ conducts upon the positiveedge of a signal at the output terminal PO₃ of the controllingmicrocomputer CMC, whereby the shutter magnet SMG is deenergizedforcibly to close the shutter serving also as an aperture, and thusexposure is terminated. After waiting for a complete closing of theshutter for a predetermined period of time, the program returns to thewinding routine which begins with S39.

Referring now to FIG. 21, there is illustrated the timer interruptionroutine mentioned in step S31. Upon timer interruption, timerinterruption is inhibited in S36, then in S37 a flashing signal isissued by the positive edge of a signal from the output terminal PO₈ ofthe controlling microcomputer CMC, whereby flashing is effected and theprogram is returned to the original step.

The operation of step S8 in FIG. 20A will now be explained in moredetail with reference to FIG. 22. In FIG. 22, first in S8-1, an open orclosed state of the trimming key switch SW₃ is detected. If the keyswitch SW₃ is closed (ON), the program advances to S8-2, in which thereis made a single step modification of a trimming mode register, then theprogram advances to S8-3. If the trimming key switch SW₃ is open inS8-1, the program advances to S8-3 without going through S8-2. In S8-3,judgment is made as to whether the sensitivity of the loaded film fedfrom the switch CAS to the input terminal PIDX is over ISO 1000 or not.If the answer is affirmative, the program advances to S8-4, in whichjudgment is made as to whether the photographing mode is below thetrimming "2" mode or not. If the answer is affirmative, thephotographing mode is changed to the real focal length photographingmode or normal photographing mode in S8-5.

On the other hand, if it is judged in S8-3 that the sensitivity of theloaded film is below ISO 1000, the program advances to S8-6, in whichthere is made judgment as to whether the sensitivity of the said film isabove ISO 400 or not. If the answer is affirmative, the program advancesto S8-7 to judge whether the photographing mode is below the trimming"3" mode or not, and if the answer is affirmative, the photographingmode is returned to the real focal length photographing mode or normalphotographing mode in S8-8. Where the film sensitivity is not above ISO400 in S8-6, and where the photographing mode is no below the trimming"3" mode in S8-7, it is not specially necessary to change thephotographing mode.

Therefore, according to this embodiment, as shown in FIG. 23, when thesensitivity of the loaded film is below ISO 400, the photographing modeis changed at every depression of the trimming setting button 8, fromnormal photographing mode to trimming "1" mode, from trimming "1" modeto trimming "2" mode, from trimming "2" mode to trimming "3" mode, fromtrimming "3" mode to close-up mode, and from close-up mode to normalphotographing mode. On the other hand, when the film sensitivity isabove ISO 400 and below ISO 1000, if the trimming setting button 8 isdepressed from the trimming "2" mode, the photographing mode returns tothe normal photographing mode and is not set to the trimming "3" modeand the close-up mode. Further, where a high sensitivity film of aboveISO 1000 is used, depression of the trimming setting button 8 from thetrimming "1" mode causes the photographing mode to return to the normalphotographing mode, without being set to the trimming "2" and "3" modesand the close-up mode. This is for the following reason. The higher thesensitivity of film, the more coarse the particles thereof, so thetrimming and close-up photographing modes requiring a large enlargingratio in printing become undesirable as the film sensitivity becomeshigher, so in this embodiment the limit of trimming is made differentaccording to film sensitivities.

The operation of the display microcomputer (DMC) used in this embodimentwill now be explained using the flow charts of FIGS. 24 to 26. First, inS46, all the input ports, the output ports and memory of the displaymicrocomputer DMC are initialized. For example, the clock mechanismincorporated in the display microcomputer DMC is initialized to "Jan. 1,1985", the photographing mode initialized to the real focal lengthphotographing mode and the count value of the film counter initializedto "0". Then, in S47, the stored contents of data necessary for displayand printing to the film are decoded, then in S48 the said data aretransmitted to the liquid crystal driving circuit LCDR, allowing theliquid crystal displays LCD₁ and LCD₂ to display the necessary data. InS49, all interruptions are permitted and in S50 the microcomputer DMCassumes the state of normal stop.

FIG. 25 is a flow chart showing timer interruption to the displaymicrocomputer DMC. Construction is made so that this timer interruptionis caused at every second. Upon timer interruption, a calendarcalculation is performed in S51 on the basis of the clock mechanismincorporated in the display microcomputer DMC, then in S52 thecalculated data is decoded, then in S53 the display date provided to theliquid crystal driving circuit LCDR is changed, and in S54 the programreturns to the original step.

Further, FIG. 26 is a flow chart showing both interruption for rewritingdisplay and interruption for printing code on the film. First, wheninterruption is caused by positive edge of an input signal t theinterruption terminal int₁ of the display microcomputer DMC, the timerinterruption shown in FIG. 25 is inhibited in S55. In the case of timerinterruption after S55, this is stored and the timer interruption isexecuted just after permission thereof Then, in S56, display data suchas the count value of the film counter and the photographing mode arereceived fom the input terminal piD, then in S57 the thus-input data anddate data are decoded, then in S58 the thus-decoded data are provided tothe liquid crystal driving circuit LCDR to change the display of theliquid crystal displays LCD₁ and LCD₂, and in S59 the timer interruptionis permitted and the program returns to the original step.

On the other hand, when interruption is caused by the positive edge ofan input signal to the interruption term int₂ of the displaymicrocomputer DMC, the timer interruption shown in FIG. 25 is inhibitedin S61, and an open or closed state of the date print selection switchSW₈ connected to the input terminal pi₁ is detected in S62. Where thisdate print selection switch SW₈ is open and the printing of the date isnot selected, the program advances to S63, in which data correspondingto the date print inhibiting code is decoded. Then, the program advancesto S65. On the other hand, where the date print selection switching SW₈is closed to select the printing of date in S62, data corresponding tothe date to be printed is decoded and the program advances to S65.

In S65, the sensitivity of the loaded film is read from the inputterminal piDX connected to the switch CAS, then in S66 a code printingtime (i.e. light emission time of the light emitting diode 32a) isdetermined according to the read film sensitivity, and the printing ofcode is started in S67. The printing time thus determined is counted inS68 and the printing of code is terminated in S69, then the programadvances to S59 to permit timer interruption.

Referring now to FIG. 27, there is illustrated a construction of anautomatic printer included in the system of the embodiment which printerperforms an automatic printing operation for printing the filmphotographed by the camera of this embodiment onto a photographic paper.In FIG. 27, the mark LA represents a printing lamp; the mark CFrepresents a color filter for the adjustment of color balancecorresponding to the three primary colors of red, green and blue; andthe mark EL represents an enlarging lens. Light emitted from the lamp LAis applied to a film F located in a print position through the colorfilter CF and lens EL. The light which has passed through the film F isprojected onto a photographic paper PP through a printing zoom lens PLwhereby it is printed. The construction of this automatic printer aswell as its operation will be explained below.

Numeral 50 denotes a lamp control circuit for controlling ON-OFF of thelamp LA. The lamp LA is used not only as a printing light source butalso for detecting a frame and in a film feeding state, for reading thecode printed in the film and for exposure determining light measurement

Numeral 52 denotes a film feeding device for feeding the filmphotographed by the camera toward the carrier of the printer, the film Fbeing moved in the right-hand in the figure. The density of the filmbeing fed rightwards is monitored by a CCD line sensor or MOS type linesensor 54. Further, a change in density of the film thus being monitoredis detected by a frame end detector 56 which receives an output signalfrom the MOS type line sensor 54, whereupon the feeding of the film bythe film feeding device 52 is stopped. More specifically, as shown inthe time chart of FIG. 28, the feed of the film is stopped by negativeedge of a signal a fed from the frame end detector 56 to the filmfeeding device 52, whereby one frame of the film is disposed just in theprinting position. The frame of the film after printing is wound upsuccessively by a film take-up unit (not shown).

When the feed of the film is stopped, a code reader 58 is operated by asignal b issued from the film feeding device 52, whereby the codesprinted on the vicinity of the frame located in the print position areread through a line sensor 60. More particularly, data concerning thephotographing mode of the frame printed, whether date is to be printedor not, and the date of print, are read by the code reader 58. The dataon the photographing mode thus read by the code reader 58 is transmittedas signal c to a printing zoom lens controller 62 for setting a printingmagnification of the printing zoom lens PL and also to a light measuringzoom lens controller 64 for setting the magnification of the photometriczoom lens ML. Magnifications of both zoom lenses ML and PL are setaccording to the photographing mode data, and in the case where thepseudo focal length photographing mode is set in photographing, aphotometric range on the frame and an enlargement ratio onto thephotographic paper are determined according to the trimming size. Thus,even in the pseudo focal length photographing mode, only the range to beprinted on the photographic paper can be accurately measuredphotometrically, and printing can be done in an enlarged state to apredetermined size independently of the trimming size.

Upon completion of the magnification setting for the photometric zoomlens ML by the photometric zoom lens controller 64, an exposurecalculation is performed by an exposure calculation circuit 66 inaccordance with a signal d indicative of that completion. This exposurecalculation is performed on the basis of an output of a photometriccircuit 68 which receives the light from the frame located in the printposition through the photometric zoom lens ML, and there are calculatedcolor balance and exposure value according to that frame. The thuscalculated data on color balance is transmitted as a signal e to afilter controller 70 and used for the adjustment of color balance. Onthe other hand, the data on exposure value is transmitted as a signal fto the lamp controlling circuit 50 and used for determining the quantityof light to be emitted by the lamp LA. Further, a signal g whichrepresents the end of photometry is also transmitted from the exposurecalculating circuit 66 to the lamp controlling circuit 50 whereby thelamp LA is turned OFF for a while.

Then, the filter controller 70 effects setting of the color filter CFaccording to the color balance data provided from the photometriccircuit 68, and upon completion of this setting, a signal h whichrepresents the completion of the filter setting is issued from thefilter controller 70.

The signal h is transmitted to the lamp controlling circuit 50, also toa shutter controller 72 for controlling the opening and closing of ashutter PS disposed in front of a photographic paper PP in the printposition, and further to a date print controller 74 which controlswhether date is to be printed or not within the frame of thephotographic paper printed. Data concerning the date to be printed onthe photographic paper, read by the code reader 58, is decoded through adecoder 76 and fed to the date print controller 74. In accordance withthis data the date print controller 74 sets year, month and day for adate plate 78 which shows a date to be printed.

Upon input of the signal h, the shutter controller 72 begins to open theshutter PS, and after the lapse of a certain time from inputting of thesignal h until the shutter PS opens fully, the lamp controller 50 turnsthe lamp LA on to effect printing. On the other hand, if the printing ofdate is selected by the code printed in the film, then after the lapseof a certain time from inputting of the signal h until when the shutterPS opens fully, the date print controller 74 turns the lamp LD on toeffect printing of the date. The mark DL represents a date printinglens, whereby the year, month and day set on the date plate 78 areprojected and printed within the frame of the photographic paper. Wherethe printing of the is not selected by the code printed in the film, thedate is not printed because the lamp LD is not turned ON.

The lighting time of the date printing lamp LD is so controlled as to beconstant by the date print controller 74, and the lighting time of thedate printing lamp LD is so set as to be shorter than the duration ofprinting performed by the lamp LA. On the other hand, the film printinglamp LA is constructed so that the lighting time and the light intensityare controlled by the lamp controlling circuit 50 according to data onexposure value.

When the printing by the lamp LA is completed, the lamp controllingcircuit 50 turns the lamp LA off and thereafter issues an exposure endsignal j, whereupon the film feeding device 52 starts the feeding of thefilm and the shutter controller 72 closes the shutter PS. The exposureend signal j is also fed to a photographic paper feeding device 80,which in turn moves the photographic paper PP rightwards in the figure,ready for the next printing. The exposure end signal j is further fed tothe frame end detector 56, code reader 58, exposure calculating circuit66 and filter controller 70, which are thereby reset, ready for the nextprinting. The photographic paper printed is received into a photographicpaper receiving device and thus printing is effected.

In the camera of this embodiment, a date to be printed is recorded inthe film in the form of codes, so even if the film is seen directly, itis difficult to recognize the date. Particularly, in the case of using areversal film which is seldom printed on a photographic paper, even if adate is printed in the form of codes on the film, the date is notuseful. For the use of such a reversal film, a date printing device forprinting a date as a numerical value in a frame of the film may beincorporated in the camera as in the prior art so that when a reversalfilm is used a date is printed as a numerical value in the film by thedate printing device. For discrimination whether the loaded film is anordinary negative film or a reversal film, there may be used data onfilm latitude among the data recorded in the film patrone. Moreparticularly, data on film latitude (e.g. data called "exposure range")is detected from among the film sensitivity data provided from theswitch CAS in this embodiment and where it is judged that the loadedfilm is a reversal film, there may be used a conventional date printingdevice which prints a date as a numerical value in the film.Alternatively, construction may be made so that a date printing deviceis selected manually according to the loaded film.

Further, in the case of a reversal film, printing is usually notperformed, so the camera may be constructed so that the switching to thepseudo focal length photographing mode (trimming "1", "2", "3" mode andclose-up mode) is inhibited upon detection of a loaded reversal film.

In this embodiment, the pseudo focal length photographing mode with hasthree modes each of the pseudo focal lengths being different from eachother, namely the trimming "1", "2", "3" modes. And, the maximumaperture value (minimum F-number) and the longest (maximum) shutterspeed are limited and are changed in accordance with the pseudo focallength in the pseudo focal length photographing mode. But the presentinvention is not limited thereto. It may be constructed so that theminimum F value or the maximum shutter speed is changed over accordingto whether the pseudo focal length photographing mode is selected ornot. With such a change of limit value, a warning value such as a camerashake warning may be changed over according to whether the pseudo focallength photographing mode is selected or not. Although this embodimentis constructed so that in the event an appropriate exposure is notobtained even at the maximum shutter speed limit flashing is doneautomatically, construction may be made so that a light emitting portionof the flashing device is projected from the camera body to urge theuser to use the flashing device.

In a camera capable of automatically controlling its exposure, theaperture value set in aperture priority shutter speed automaticcontrolling mode should be limited according to whether the pseudo focallength photographing mode is selected or not, the aperture valuecalculated in shutter speed priority aperture automatic controlling modeand in programmed exposure controlling mode should be limited accordingthereto.

Further, although the camera of this embodiment is constructed so thatthe aperture and the shutter speed change in a triangular form as shownin FIG. 18, construction may be made so that they change in atrapezoidal form and where the pseudo focal length photographing mode isselected, the height of such trapezoidal form is limited to therebylimit the aperture.

Moreover although the automatic printer used in this embodiment isconstructed so that data are printed in a corner of the object printedrange, the present invention is not limited thereto. It may beconstructed so that data are printed in the white frame portion outsidethe object printed range. Further, where data are also printed in theobject printed range, the color of data to be printed may be changed foreasier discrimination of data. Alternatively, construction may be madeso that the position for easy discrimination of the color of data issearched and data is printed in that position. Additionally, the dataprinting optical system may be adjusted so that the position and size ofprinted data are changed according to print sizes, thereby facilitatingthe confirmation of printed data and eliminating the influence on theobject printed.

Further, construction may be made so that the codes printed in the filmcomprise magnetic codes which are memorized in a magnetic recordinglayer applied onto the film. The data printed as codes are not limitedto such photographed year, month and day as in the above embodiment.They may be data of hour, minute and second, photographic exposure data,and a consecutive number.

Moreover, although in the automatic printer of the above embodiment theprinting optical system and the photometric optical system are providedeach independently, a part of them may be used in common to both. Forexample, a light receiving element for photometry may be disposed on theshutter (PS- shown in FIG. 27.

Further, although the above embodiment is constructed so that data areprinted outside the photographed frame in the film, the presentinvention is not limited thereto. A light shielding means for shieldingthe incidence of light from an object may be provided in a corner of oneframe photographed or in a predetermined region near the lower sidethereof, to thereby effect the shielding of light only when the pseudofocal length photographing mode is selected or at all times, and datamay be printed in the thus-shielded range.

Although the present invention has been fully described by way ofexample with reference to the accompanying drawings, it is to be notedhere that various changes and modifications will be apparent to thoseskilled in the art. Therefore, unless otherwise such changes andmodifications depart from the scope of the present invention, theyshould be construed as being included therein.

What is claimed is:
 1. A photographic camera having a photographic lens,comprising:means for selecting a real focal length photographing mode inwhich a normal range in a frame of a film will be printed on aphotographing paper and a pseudo focal length photographing mode inwhich a range smaller than the normal range in a frame of the film willbe printed on a photographing paper; means for measuring light from apredetermined range corresponding to an angle smaller than an angle ofview of the photographic lens, the predetermined range beingunchangeable irrespective of the selection of the photographing mode andapproximately corresponding to a photographing range in an object fieldwhen the pseudo focal length photographing mode is selected; and meansfor controlling exposure of the photographic camera in accordance withthe measured result.
 2. A photographic camera as claimed in claim 1,wherein the photographing range of the pseudo focal length photographingmode contains the predetermined range.